Join Date: Jan 2000
Location: Houston, TX USA
Re: Milky Oil and coolant in #7, am I screwed or what?
WAIT!! Before you go tearing the head off, start with the first things FIRST!
Have you performed a compression test yet? Change the oil & filter and then do that. Start with the cylinder in question, and then do each of the other cylinders on that bank.
He gave several clues that COULD lead you to believe it has a bad head gasket-and in the end it just might. But BEFORE he goes tearing the motor apart, check the obvious things first. In his original post it states "air gap manifold"... Okay, is that the one by EDELBROCK, or the knock-off put out by Perform-less Products?
If he has the knock-off he might have found his problem right there. Do a search under my user name and you will find that I had a very similar problem recently. Now where exactly is cylinder #7 located?? Oh yes, drivers side of the motor all the way at the rear.. And what is it next to? Oh yes, the water port in the end of the head.. And how well machined are the knock-off air gaps...... :-(
Change the oil and filter first, then perform the compression test. If the compr. test checks out okay, rent/borrow one of the cooling system testers that pressurizes the cooling system and check for leaks that way. If the pressure drops over time (can't remember what the instructions say) you may have found your problem.
Otherwise, the compression test is still a valuable diagnostic tool to determine/decide what is really happening within the motor and should be performed before a tear down.
Let us know what you find. Feedback is helpful to other members who might be experiencing the same, or similar problems as you in the future.
1969 383CI, T-56, 12 bolt-3.31 posi, 13" C5 Rotors, PBR Calipers, rear disc system..